Nonsense from one's betrothed (3)

I believe the answer is:

rot

'nonsense' is the definition.
(rot can mean nonsense or rubbish)

'from one's betrothed' is the wordplay.
'from' says the answer is hidden in the clue.
'ROT' is hidden within 'ones betrothed'.

(Other definitions for rot that I've seen before include "Break down, waste away" , "Deterioration" , "Collapse" , "Putrefy" , "Balderdash" .)

I've seen this clue in the Evening Standard.

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